Optic flow is a critical cue to depth when a person is driving, though it also operates, of course, when a person moves slowly through a scene. The objects and surfaces near the point toward which the person is heading is called _____, which move(s) outward slowly in the retinal image.
A) motion parallax
B) cast shadows
C) focus of expansion
D) linear perspective

Question

Quizplus · Accepted Answer

The focus of expansion refers to the point in the visual field towards which a person is moving, from which optic flow emanates. As a person moves, objects and surfaces near this point appear to move outward slowly in the retinal image, providing critical information about direction and speed of movement.

Optic Flow Is a Critical Cue to Depth When a Person